55440339 has 4 divisors (see below), whose sum is σ = 73920456. Its totient is φ = 36960224.

The previous prime is 55440337. The next prime is 55440391. The reversal of 55440339 is 93304455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55440339 - 2¹ = 55440337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55440337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9240054 + ... + 9240059.

It is an arithmetic number, because the mean of its divisors is an integer number (18480114).

Almost surely, 2^55440339 is an apocalyptic number.

55440339 is a deficient number, since it is larger than the sum of its proper divisors (18480117).

55440339 is a wasteful number, since it uses less digits than its factorization.

55440339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18480116.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 55440339 is about 7445.8269520584. The cubic root of 55440339 is about 381.3074515588.

The spelling of 55440339 in words is "fifty-five million, four hundred forty thousand, three hundred thirty-nine".